Improvement in insertible saw-teeth



C. ADAMS.

N.PETERS, PHO-TWLHHOGRAPNER. WASHINGTON. D L.

- UNI D ST TES;

CALVIN ADAMS, OF RUSSELLSBURG, PENNSYLVANIA.

IMPROVEMENT ININSEIRTI'BLE SAW-TEETH.

Specification forming part of Letters Patent No. 177,446, dated May 16, 1876; application filed December 7, 1875.

Toall whom it mag concern: Be it known that I, CALVIN ADAMS,' of

"Russellsburg, in the county of Warren and Y my'inv'ention therein consists in the peculiar form'of the tooth, which adapts it to have specially the advantages before named.

In order to enable thoseskilled in the art to make and use my tooth, I now proceed to describe the same, having reference to the drawing, making a part of this specification,

' in which- I Figure 1 is a side view of my saw-tooth in a portion of a saw-plate; Fig. 2, a front view of the said tooth Fig. 3, a top view of the same.

Like letters denote corresponding parts in each figure.

In the drawings, A represents the saw-plate of any ordinary construction; B, the sawtooth; O, the recess in the saw-plate, and D 1 the key, which fastens the tooth in position.

The said tooth, which is a hook-tooth, has the upper and under edges a and b rounded as 'far as the cutting-faces hereinafter described.

The upper cutting-face 0 extends in about the same line of direction as the edge a, but gradually widens out to a point, (1, and fromthat point to the extreme end 0 flares more rapidly, as shownin Fig.3. Through this face 0 a groove, f, extends to the extreme end 0 of the tooth. The undercutting-face g is hollowed out a little from the: upper end of the edge b the extreme end 6 of the tooth. The body etooth is grooved on both sides, It and n yorder to hold more firmly in the recess id plate, whose corresponding edges accordingly, andis inserted and vendown' idplace therein. At the lower cernersji andi ofvthe recess the same is cut out in semicircular form to prevent the saw from cracking in such corners. In the body of the tooth is formed the radial slot E, extending from a point nearits center to the outer edge of said tooth. The upper and lower edges of the slot E are beveled to agree with corresponding grooves in the key D. This key, of the same thickness of the sawplate, is inserted in the tooth before the tooth is inserted in the saw-plate, and the act of driving in the tooth causes the slot E to be tapered a little toward the edge of the saw. An opening, k, in the tooth serves to admit any proper tool or punch to assist in backing out the tooth. To place the tooth in position, the key being in place in the slot with a small space near its inner end j, the tooth is driven into the recess by inserting a proper punch into the inner endj of the slot E, and by blows upon the punch the tooth is forced down into the recess.- By then striking upon the side of the punch the key D is driven outwardly in the slot E toward the edge of the tooth sufficiently to hold the same firmly in posi- 'tion.

In the tooth shown in Fig. 4 the slot E is vertically arranged, and runs to the bottom of the tooth and to assist, further, in holding the tooth imposition there are notches l on either side of the tooth near its bottom to engage with corresponding projections m in the saw-plate.

The particular advantage connected with this construction of saw-tooth results from the fact that this key is always held in place in the body of the tooth, and when the tooth and bringing no especial strain on the sawplate, as is the case with keys inserted in the saw-plate, or partly in the plate and partly in thetooth. Moreover, as it is requisite in an inserted tooth that it shall out with the least possible resistance or friction, the peculiar shape of the cutting-faces, one being grooved PATENT QFFICE.

with strong flanged cutting-lips and the other and adapted for a locking-key to be retained hollowed out, tends greatly to'this result. in the tooth, and driven outwardly, substan- Having thus described my saw-tooth, its tially as described. manner of use, and some of its advantages, This specification signed and witnessed this what I claim as new therein, and desire to se- 6th day of December, 1875.

cure by Letters Patent, is- CALVIN ADAMS.

The saw-tooth B, constructed with the slot Witnesses: E, extending'radially from a point near the CHAS. THURMAN,

center of the tooth to the outer edge thereof, R. N. DYEB. 

